Reply To: Specific format

I’m trying to edit the Form plug-in to force a format. Here is the line of code I would put

<input type='tel' pattern=' [\(]\d{3}[\)]\d{3}[\-]\d{4}' title='Phone Number (Format: (999)999-9999)'>

If I put it in the connections_form.php file, will it force a format? I tried it and it didn’t work, so I thought you could give me more insight.

Thanks!